Parchment Paper Sheets-12 x 16 1/2" John & Jennie's Parchment paper is perfect for non-stick baking and cooking. Pack of 100 precut John & Jennie's Silicone sheets. Dimensions: 16 1/2"X 12"w Made of silicone coated vegetable parchment (100% pure cellulose fiber) Suitable for use in conventional ovens up to 450 degree f/230c and in the microwave